Polishing device for rolls



J. WILLIAMS 1,880,622

POLISHING DEVICE FOR ROLLS Filed March 27, 1931 2 Sheets-Sheet 1 1 N V EN TOR.

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Patented Oct. 4, 1932 UNETED ST teen;

JESSE wILLIAMsor Mormon, MICHIGAN romsnrne .nnvrcn non 'noLLs Application filed March 27,1931. Serial No. 525,745.

This invention relates to improvements'in automatic polishing devices for rolls. In rolling mills it is customary to change the rolls between whichsheetor other stock is 5 rolled at frequent intervals as the peripheries of the rolls quickly become marred. It is an object of this invention to provide a cheap and simple form of polishing device by which the surfaces of therolls are con- "I tinuously polished throughout the whole time they are in operation. v

Another object of the invention is to provide a roll polishing device having automatic means for continuously reciprocating the polishing elements back and forth across the rolls so that uniform polishing action is exerted across their'whole widths.

A further object of theinvention is to provide such a roll polishing device wherein the polishing elements are so mounted that they may be readily removed when worn and replaced by others. V

,l-Vith these and other objects and advantages in view which will become apparent as the specification proceeds the invention is hereinafter more fully described with the aid of the accompanying drawings, in which:

Figure 1 illustrates a side elevation of a set of rolls equipped with the invention,

.30 a -Figure- 2 shows a front elevation thereof,

and i Figure?) is a partial plan view. ;Figure,4: is a section on the line 1.4: of Figure 2, and V V Figure is a similar view showing one polishing element moved pivotally from its roll, and p 1 Figure 6 is an enlarged section on the line 66 of Figure 1. i l

Referring to the drawings, 1 designates the usual uprights between which upper and lower rolls 2 and; 3 are mounted in the conventional manner.

Secured to one extremity of the lower roll 3 and concentric therewith is a flange 4 having an integral extension 5 on which a sprocket wheel 6 is secured. In the uprights 1 two pair of opposed horizontal bearings 7 and 7a and 8 and 8a are arranged. Axially slidable through the bearings 7 and 7a; is a I jacent upright.

- ment.

transverse member 9, and axially slidable through the bearings .8 and 8a is a second transverse member 10. The members 9 and 10, which are preferablyarrangedone im mediately over the other, are secured on one side of the machine and-adjacent their extremities to the ends of a yoke 11. The latter intermediately of its length is provided with a horizontally disposed nut 12 having both right and left hand threads cut therethrough. .00

14 indicates a bearing provided in a bracket 15 secured to one of the uprights 1, and 16 denotes a second bearing provided in the ad- These bearings. 1 1 and 16 support the extremities of aspindle 17 which 68 is held against axial movement in any preferredmanner, and intermediately of its length this spindle is provided with both right and left hand external threads to coact with either of the threads in the nut 12. 7o Fixed on the spindle 17 is a sprocket wheel 18 driven by the rotation of the sprocket wheel 6 through a chain 19.

Around the spindle 17 two helical springs 20 and 21 are arranged. Thespring 20 ex- 76 tends from one side of the nut 12 to the adj acent upright 1, and the spring 21 from the other side of the nut 12 to the adjacent side of the sprocket wheel 18." In Figure 6 it will be noted that by rotation of the spindle 17 80 one set of cooperating threads in the nut 12 and spindle 17 have causedthe yoke 11 to be moved to its limit of travel away from the adjacent upright 1, and have also compressed the spring 21. This spring then tends to move-the yoke 11 towards the upright 1 and causes the other set of coacting threads in the nut 12 and on the spindle 17 to engage so that the nut, through the rotation of the spindle, is moved to its other limit of travel when the 1 spring 20 is compressed and again brings the other cooperating threads into; engage Thus a reciprocating motion-isJim-' parted'to the yoke 11 and the transverse members 9 and 10. V

Between the uprights lupper and lower bell cranks 22 and 23 are so mounted'onthe transverse members 9. and 10 that rotary V movement of the former on the latter is per;- mitted though independent axial movement of the former on the latter is prevented by collars 9a and 10a. One arm 22a and 23a of each bell crank supports a polishing element holder 24: and 25 respectively in which polishing elements 29 and 30 are mounted. Rotatably mounted on the second arm 22b of each bell crank 22 is a pulley 26 around which acable 27 passes. One extremity of each cable is secured to the second arm 28?) of each bell crank 23 and to the other extremity ofeach cable a weight 28 is secured.

From Figure 5 it will be .seen that by raising the arms 22?) of the bell cranks 22 the polishing elements 29 are moved away from the upper roll 2 without interfering with the operation of the polishing elements 30 which remain in contact with the lower r0113; In operation it is frequently found that upper rolls move eccentricallyto a considerable extent and it is therefore necessary to provide means whereby this eccentric movement will not interferewith the working of the polishing elements; and as it is desirable to employ the same counterweighting arrangement for holding both sets of polishing elements in contact with their rolls so that all the cooperating parts of my device occupy as little space as possible, it is necessary to provide a counterweighting arrangement wherein the eccentric movement of the upper roll above referred to will not impair the efiicacy of the polishing elements in contact with either roll.

3 Any desired means may be employed for preventing movement of the polishing elements in their holders.- One method that may be utilized is to formends on the holders 24 and 25 as indicated at 24a and to insert blocks 32 between the adjacent ends of the elements 29 and 30.

.WVhile in the foregoing the preferred embodiment of the invention has been described and shown, it is understood that the construcrights and movable parallel'with the axes of said rolls, said members being arranged one above the other and one member being adtransverse members supported by said uprights movabl parallel with the axes of said rods, a spindle rotatably supported by one of said uprights, means for driving said spindle by the rotation of one of said rolls, said spindleintermediately of its length being provided with right and left hand threads, a nut having right and left hand threads cooperating with the threaded portion of said'spindle, a yoke integral with said nut, the extremities of'said yoke being secured to the extremities of said transverse members, and means for insuring that the right and left hand threads of the spindle and nut cooperate alternately so that reciprocating motion is imparted to said yoke and members, and polishing elements carried by said members.

3. In an arrangementof the character described, the combination of spaced uprights,

upper and lower rolls rotatably supported thereby, opposed bearings extending transversely through said uprights, upper and lower transverse members movable axially through said bearings, means arranged exteriorly of'one of said uprights for reciproeating said members when said rolls are turned, a polishing element holder pivoted about each member, polishing elements mounted'in said holders so that the elements in one holder bear against one roll and the elements in the other holder against the other roll, an arm projecting from each of said polishing elementholders, guide pulleys rotatably supported by the arms extending from the upper polishing element holders, a cable secured to the arm of each lower element hold- 'er and extending overand partly around the guide pulley above it, and a weight secured extremity of each cable.

tothe opposite j JESSE WILLIAMS.

jacent each roll, a spindle rotatably supported 7 1 exteriorly of one of said uprights, means driving said spindle from the rotationof one of said rolls, a yoke reciprocated by the rotation of said spindle, one of said transverse members being secured to each extremity of said yokexso that reciprocation of the latter imparts reciprocating movement to sa1d-members, polishing elementhold'ers pivoted on 

